diff options
author | Maxim Levitsky <maximlevitsky@gmail.com> | 2010-02-22 20:39:41 +0200 |
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committer | David Woodhouse <David.Woodhouse@intel.com> | 2010-02-26 19:06:50 +0000 |
commit | 7d17c02a01a111f40986859f044c8c4cce8a4aa6 (patch) | |
tree | b9fec0a8ad3073e3d7ca442fc1db17b054974e66 /drivers/mtd/sm_ftl.h | |
parent | a7790532f5b7358c33a6b1834dc2b318de209f31 (diff) |
mtd: Add new SmartMedia/xD FTL
This implements new readwrite SmartMedia/xd FTL.
mtd driver must have support proper ECC and badblock verification
based on oob parts for 512 bytes nand.
Also mtd driver must define read_oob and write_oob, which are used
to read and write both data and oob together.
Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/sm_ftl.h')
-rw-r--r-- | drivers/mtd/sm_ftl.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/mtd/sm_ftl.h b/drivers/mtd/sm_ftl.h new file mode 100644 index 00000000000..e30e48e7f63 --- /dev/null +++ b/drivers/mtd/sm_ftl.h @@ -0,0 +1,94 @@ +/* + * Copyright © 2009 - Maxim Levitsky + * SmartMedia/xD translation layer + * + * Based loosly on ssfdc.c which is + * © 2005 Eptar srl + * Author: Claudio Lanconelli <lanconelli.claudio@eptar.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/mtd/blktrans.h> +#include <linux/kfifo.h> +#include <linux/sched.h> +#include <linux/completion.h> +#include <linux/mtd/mtd.h> + + + +struct ftl_zone { + int initialized; + int16_t *lba_to_phys_table; /* LBA to physical table */ + struct kfifo free_sectors; /* queue of free sectors */ +}; + +struct sm_ftl { + struct mtd_blktrans_dev *trans; + + struct mutex mutex; /* protects the structure */ + struct ftl_zone *zones; /* FTL tables for each zone */ + + /* Media information */ + int block_size; /* block size in bytes */ + int zone_size; /* zone size in blocks */ + int zone_count; /* number of zones */ + int max_lba; /* maximum lba in a zone */ + int smallpagenand; /* 256 bytes/page nand */ + int readonly; /* is FS readonly */ + int unstable; + int cis_block; /* CIS block location */ + int cis_boffset; /* CIS offset in the block */ + int cis_page_offset; /* CIS offset in the page */ + void *cis_buffer; /* tmp buffer for cis reads */ + + /* Cache */ + int cache_block; /* block number of cached block */ + int cache_zone; /* zone of cached block */ + unsigned char *cache_data; /* cached block data */ + long unsigned int cache_data_invalid_bitmap; + int cache_clean; + struct work_struct flush_work; + struct timer_list timer; + + /* Async erase stuff */ + struct completion erase_completion; + + /* Geometry stuff */ + int heads; + int sectors; + int cylinders; + + struct attribute_group *disk_attributes; +}; + +struct chs_entry { + unsigned long size; + unsigned short cyl; + unsigned char head; + unsigned char sec; +}; + + +#define SM_FTL_PARTN_BITS 3 + +#define sm_printk(format, ...) \ + printk(KERN_WARNING "sm_ftl" ": " format "\n", ## __VA_ARGS__) + +#define dbg(format, ...) \ + if (debug) \ + printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__) + +#define dbg_verbose(format, ...) \ + if (debug > 1) \ + printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__) + + +static void sm_erase_callback(struct erase_info *self); +static int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block, + int put_free); +static void sm_mark_block_bad(struct sm_ftl *ftl, int zone_num, int block); + +static int sm_recheck_media(struct sm_ftl *ftl); |